Synthesis of Bi2WO6/NiO photoanode via flame annealing and PEC performance evolution
To help ease the increasingly serious energy crisis and environmental pollution,photoelectrochemical(PEC)water splitting,as a highly promising technology using solar energy,has received widespread research attention.First,Bi2WO6/NiO composite was successfully prepared by a simple spinning annealing method.Compared with the use of pure Bi2WO6,the water oxidation performance of Bi2WO6/NiO photoanode prepared by flame annealing is improved by fourfold.And the best photocurrent reaches 0.04 mA/cm2@1.23 VRHE in 0.5 M Na2SO4,showing an excellent photocatalytic activity and stability.The results show that the formation of Bi2WO6/NiO photoanode can improve the utilization of sunlight,effec-tively inhibit the carrier recombination,and boost charge transfer performance.
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